common code patterns

Richard Gaskin ambassador at fourthworld.com
Thu Aug 10 17:02:18 EDT 2017


Monte Goulding wrote:
 > Sorry folks I should have been more specific and said using existing
 > syntax. So the original thing posted is what I’m after at the moment:
 >
 > local tIndex
 > put 1 into tIndex
 > repeat for each line tLine in tLines
 >    — code
 >    add 1 to tIndex
 > end repeat

Except that's wrong. :)

I tend to use 0 as the initial value, and increment at the top of the loop:

   local tIndex
   put 0 into tIndex
   repeat for each line tLine in tLines
       add 1 to tIndex
       — code
   end repeat

I've found two benefits from this habit:

1. (minor) Clearer distinction between unincremented and incremented 
counter.

2. (major) I can "next repeat" at any point in the block and know that 
the counter is appropriately updated.

Indeed, it was a runaway loop many years ago that set me know this path.


All this raises a bigger question:  can we for now provide some sparse 
minimums and perhaps consider adding more later if truly needed?

Saves work for you folks, and obviates the need to have what would 
likely be really long threads here about different coding styles (or 
whether all possible styles should be supported in Prefs  - "Damnation 
to the dangling 'thens'!" <g>).

-- 
  Richard Gaskin
  Fourth World Systems
  Software Design and Development for the Desktop, Mobile, and the Web
  ____________________________________________________________________
  Ambassador at FourthWorld.com                http://www.FourthWorld.com




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